In this Nevada wildlife refuge area, discover a mysterious geothermal pool that houses the world's rarest fish and extends ...

LAS VEGAS, Nev. (FOX5) - The number of the world’s rarest fish, found in a deep hole in Nye County, is up but environmentalists are sounding the alarm about a possible threat to their water.

It’s a labor-intensive process — a vital one that keeps a pulse on the rarest fish in the world. Numbers dip, hopes high The total count of pupfish in the wild calculated on April 8 is down ...

In rare video footage, a male whale shark has been spotted biting at his female partner during courtship. Before now, we knew very little about the secret sex lives of the world's largest fish ...

The only known survivors were 158 of the rare fish the agency isolated at a hatchery ... and aren’t known to exist anywhere else in the world, Colorado Outdoors Magazine reported in 2019.

The U.S. Fish and Wildlife Service today proposed to designate 91,630 acres of critical habitat under the Endangered Species Act for the critically imperiled San Francisco Bay population of longfin ...

I write about the world of biology ... These nightmarish "trips" are as rare as the fish itself. After his dinner on the French Riviera in the spring of 1994, a 40-something-year-old man ...